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2.4L Low CYL Compression 850

posted by  mkwk on  Wed Feb 16 17:11 CST 2005
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last visit: Thu Sep 6 16:01 CST 2007
[RELATED]

Just found 2 cylinders at 40 psi compression on my 1995 850GLT. I added oil and they came up quite a bit. Must be either bad rings and or cylinder walls. This car is average with 170k miles on it, worth about $5000 with a good engine. Do I do a engine job with the block in the car, or pull eng and work it over, or is there a way to come up with another used engine???








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    2.4L Low CYL Compression 850

    posted by  SUNSCIRCUS on  Sat Feb 19 05:36 CST 2005
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    last visit: Fri Jan 29 03:20 CST 2010
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    Are the 2 low compression cylinders located side-by-side?
    It might be just a leaky head-gasket between the 2 cylinders...



    --
    Ken








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      2.4L Low CYL Compression 850

      posted by  mkwk on  Sat Feb 19 05:49 CST 2005
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      last visit: Thu Sep 6 16:01 CST 2007
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      yes they are I will check it out

      Thanks








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        2.4L Low CYL Compression 850

        posted by  SUNSCIRCUS on  Sun Feb 20 01:05 CST 2005
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        last visit: Fri Jan 29 03:20 CST 2010
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        I'll bet ya is the head-gasket! it happened to my own brother a month ago with his S70. The 2 low compression cylinders were located side-by-side and BOTH exactly at 38 psi !!
        --
        Ken








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          2.4L Low CYL Compression 850

          posted by  mkwk on  Sun Feb 20 04:34 CST 2005
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          last visit: Thu Sep 6 16:01 CST 2007
          [RELATED]

          Ok My cyl didnt have exactaly the same compression and when i put some oil in the cyl the pressre picked up so i thought it was the rings??? I will have to pull the head or bore scope the cyl








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    2.4L Low CYL Compression 850

    posted by  someone claiming to be driver8 on  Fri Feb 18 16:52 CST 2005 [RELATED]

    If you have the ability, why not just hone the cylinders and replace the rings? You should be able to do that with the engine in...might be a bit awkward. If you pull it, rebuild it fully if you want to keep it. If you want to sell it, just get an engine from a junkyard and put it in.








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    2.4L Low CYL Compression 850

    posted by  james_a_sousa on  Thu Feb 17 13:54 CST 2005
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    last visit: Thu Oct 23 18:51 CST 2014
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    How long have you had the car? Did you check it when you bought it?

    How does it run?

    Why not just drive it?

    I have seen cars pick up compression when they are well cared for.
    --
    '96 855R, 95 855, '95 854, 90 744TI 377,000 miles on 7 bricks








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      2.4L Low CYL Compression 850

      posted by  mkwk on  Thu Feb 17 15:07 CST 2005
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      last visit: Thu Sep 6 16:01 CST 2007
      [RELATED]

      I have had car for 5 years and I have driven it 100k miles.. I have never done a compresion check on this engine before..

      It is low on power and is dropping.. The oil consuption is increasing over time...

      It has 5 years of good maint and easy or normal driving...

      I dont think it will cure it self if it is cyl wall damage... I will borescope the cylinders to look at cyl walls..
      If the are smooth maybe it is just stuck rings??? If so maybe i can break them loose some how Engine cleaner??

      This is a non turbo engine...

      Thanks








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        2.4L Low CYL Compression 850

        posted by  james_a_sousa on  Fri Feb 18 13:49 CST 2005
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        last visit: Thu Oct 23 18:51 CST 2014
        [RELATED]

        Looks like you have a pretty good grasp of the situation. Your second post helps me understand your problem much more.

        Perhaps you should post a summary of both these posts at Volvospeed? There seems to be a lot more FWD action there.
        --
        '96 855R, 95 855, '95 854, 90 744TI 377,000 miles on 7 bricks







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